2.APC (global industry leading brand, top ten UPS power supply brands)
3. Emerson Emerson (USA 1890, one of the oldest multinational companies in the world)
4. Exeter power supply (world famous brand, top ten UPS power supply brands)
5. Delta (large enterprise group, top ten UPS power brands)
6. Ke Hua Kelon (first-line brand/brand, top ten UPS power brands)
7. Champion CHESHING (first-line brand/brand, top ten UPS power brands)
8. Mei Lanzhi MGE (one of the earliest and largest UPS manufacturers in the world)
9. Sitong (one of the leading brands in UPS industry and one of the top ten UPS power supply brands)
10. Sandton Sendon (1984, a large multinational enterprise, one of the top ten UPS power brands).